Hydraulic valve.



A. L. GRAND'STAFF.

HYDRAULIC VALVE.

APPLICATION FILED MAY 6 1914.

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Maw //M Patented Oct. 26, 1915.

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A TTOR/VEYS A. L. GRANDSTAFF.

HYDRAULIC VALVE.

Patented Oct. 26, 1915.

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ALBERT L. GRANDSTAFF, OF STEUBENVILLE. OHIO.

HYDRAULIC VALVE.

Specification of Letters Patent.

llal'ented Uct. 26, 1915.

Application filed May 6, 1914. Serial No. 836,684.

1 '0 all whom if m (13 concern Be it known that l. Aunnrr L. GRAND- s'rwrr. a citizen of the United States, residing at Steubenville. in the county of Jetferson and State of Ohio. have invented certain new and useful Improvements in Hydraulic Valves, of'which the following is a specification.

.\l v invention relates to hydraulic valves, more pm'ticularly of the type employed in controlling hydraulic presses.

Among the objects sought to he act-our plishcd by my improvement are rl more thorough control over the motor by the operator: (II) the use of merely a single inlet opening to be kept tight: (Ill) to enable the inlet valve to be operated by aid of mechanism completely housed within the inlet chest and hydraulic valve casing, so that practi ally the only movable part protruding is a single hand lever; and (IV) to en able the hydraulic valvand all of its movable parts to be easily controlled owing to the factthat the fluid is admitted through the single inlet valve.

Reference is made to the accompanying drawings forming a part of this specification and in which like letters indicate like parts.

Figure l is a longitudinal section through the hydraulic 'alve and parts immediately associated therewith; Fig. is a section on the line Il1l of Fig. 1 looking in the direction of the arrow; Fig. 3 is a detail view, showing in perspective the movable inlet valve member; Fig. -l is a horizontal section showing my invention as used with a form of easing different slightly from that appearing in Figs. 1 and 2.

A wasing 5 is provided at its ends with heads (3 and connected with the head 7 is a discharge pipe 8. The casing 5 is provided with a compartment 9 having generally a cylindrical form, and extending upwardly from this compartment is a passage at 10 having generally the form of a slot of considerable size, as may be understood from Employed within the casing 5 is a sleeve l1 provided with an enlarged annular pcrtion 12. Another sleeve 13 is similarly provided with an enlarged annular portion 14. 'These sleeves 1113 are provided with annular passages 1516 and connected with the latter are passages 17-18 with which the casing 5 is provided. Communicating I with the passages 17-18 are pipes 1!)-20, which lead to and are connected with a hydraulic cylinder 21. This cylinder is provided with a stutiing box 22, and extending through this stul'ling box is the ram 23.

Located within the casing 5 is a plunger 24 having a general cylindrical form and provided at its ends with annular portions 2; 26, the diameter of which is slightly greater than the general external diameter of the plunger 2.1 which lies between these portions. The plunger is further provided with a passage '37 extending entirely through it. in the direction of its axis. For the purpose of shifting the plunger ii in the general direction of its length within the casing, I provide the plunger with a lug 28 having a recess 29. Above the plunger 24: is a rocking shaft ill) and mounted rigidly upon the latter is a sleeve 31. Integral with this sleeve is a heart cam Below the rocking shaft 30 is a knob :32, which extends into the recess '29. A hand lever 33 is mounted rigidly upon the rocking shaft 30 for the purpose of actuating the same. Normally the hand lever extends straight downward, or horizontally as the case may be. depending upon the relative position occupied by the entire device. \Vhen, however, the hand lever is rocked in either of two directions, the rocking shaft 30 is rocked to the same extent and the knob 32 therefore. shifts the plunger 24: in the general direction of the length of the latter. Mounted upon the valve casing 5, and closing the top of the same, is an inlet chest 3i. This inlet chest is provided with an annular partition and above this partition is a substantially cylindrical compartment 35. A screw plug 36 is fitted into the top of the, inlet chest 34 and is provided with a flange 37 and with an angular head 38. The screw plug 36 is further provided with a centrally disposed passage 9 of substantially cylindrical form. and located within this passage is a sp' a1 spring to. Below the screw plug 36 is the inlet valve l1that is the movable valve member which controls the admission of fluid into the casing The inlet valve l1 has generally the form of a disk, provided with a stem 42, this stem being provided with a number of spirally disposed passages 43. The inlet valve 41 is further provided with a centrally disposed passage 44 (see Fig. 3) and extending into this pasdisposed passages 43.

sage is a stem 45. This stem at its lower end carries a cup 46 having an outwardly extending annular flange 47.

A sleeve 48 extends through the annular partition 35, which is threaded externally and fitted to this partition, the latter being threaded for thispurpose. The sleeve 48 is provided with an annular flange 49 integral with it and resting upon the annular partition The sleeve 48 is further provided with an annular portion 50, which is corrugated upon its uppersurface, as may be understood from Fig. 1. A gasket 51 of annular form encircles the cup 46 and is carried by the valve 41. lVhen this valve is seated, the gasket 51 is pressed tightly against the valve seat 50. The lower end of the valve 41 is hollow, and encircles the valve seat 50. The sleeve 48 is provided with a number of radially disposed passages 52. Extending axially through the sleeve 48 is a rod 53, carrying a shoe 54, the latter fitting loosely within the sleeve 48, and resting upon the heart cam 32. The pressure of the spring 40 normally holds the inlet valve member 41 down upon its seat, and in doing this the rod 53 presses the shoe 54 down into firm engagement with the heart cam. An inlet pipe .is shown at 54, and is connected directly with the inlet chest 34, at a point adjacent the inlet valve 41. The cylindrical compartment 39 readily fills with Water or other liquid admitted through the inlet pipe 54, and whenever the inlet valve 41 is raised from its seat, the water within the compartment 39 rushes downwardly through the spirally In doing this the water, by its escape, produces a slight rotary movement of the inlet valve 41. This causes the valve to occupy a slightly different position each time it engages the valve seat. The wear of the inlet valve and of its seat is thus rendered comparatively uniform, and leaking is thus prevented.

In order to use the hydraulic valve the hand lever'33 is rocked in either of two directions, as above described, the rocking of the hand lever causes the heart cam 32 to rock, so that the inlet valve 41 is lifted from its seat. The liquid from the inlet pipe 54 thereupon passes downwardly through the sleeve 48 and out through the openings 52 into the casing 5. It thence finds its way through the port 17 or the port 18, as the case may be, and enters the cylinder 21. The water or other liquid already contained within this cylinder makes its escape, passing upwardly through either the port 18 or the port 17, as the case may be, and thus entering one end of the casing 5. It thence passes out through the discharge pipe 8. This discharge pipe is in communication with both ends of the casing 5, as may be understood from Fig. 1.

In the form shown in Fig. 4, the parts are the same in structure and action as above described with the exception that instead of a passage 27 (see Fig. 1) through the plunger 24, I employ a cored passage 56 extending through the wall of the casing, which is here designated as The passage 56 simply maintains communication between the ends of the casing 55, in the same manner that the passage 27, shown in Fig. 1, maintains communication between the ends of the casing 5. It will be noted that the inlet valve 41 is the only valve needed for controlling the distribution of the liquid until the liquid reaches the casing 5 or valve chest proper.

As may be understood from the foregoing description, the invention is comparatively simple, and the movable parts are completely under control of the operator at all times.

The mechanism contained within the inlet chest 3-1 is very readily accessible, the removal of the screw plug 36 being the only thing required to enable the operator to remove any or all of the movable parts contained in the inlet chest.

I do not limit myself to the precise mechanism shown, as variations may be made therein without departing from the spirit of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is as follows 2- 1. A hydraulic valve comprising a valve chest, avalve member mounted within said valve chest for controlling the distribution of a liquid flowing therethrough, an inlet chest connected with said valve chest and provided with an annular partition, a sleeve extending through said annular partition and provided with an annular flange resting upon said annular partition, said sleeve being further provided with an annular portion provided with corrugations, an inlet valve with a portion encircling said valve seat, and a gasket carried by said inlet valve and adapted to fit upon said valve seat.

2. A hydraulic valve comprising a valve chest, a valve member mounted within said valve chest for controlling the distribution of a liquid flowing through said valve chest, an inlet chest connected with said valve chest and provided with an annular partition, a sleeve supported by said annular partition and provided with openings for admitting a liquid into said valve chest, a rod extending through said sleeve, a shoe carried by said rod, means for actuating said shoe and said rod, an inlet valve member connected with said rod and controllable by movements thereof for admitting a liquid into said sleeve, and means for admitting a liquid into said inlet chest at a point adjacent said inlet valve member.

3. In a hydraulic valve the combination of a valve chest, a valve member mounted within said valve chest for controlling the distribution of a liquid flowing through said valve chest, an inlet chest connected with said valve chest, a valve seat located within said inlet chest, avalve located within said inlet chest and movable relatively to said seat, said inlet valve member being free to turn relatively to said seat and being provided with a stem having a spirally disposed passage, and a chamber communicating with the inlet chest and into which the stem of the valve projects, whereby the liquid in the chamber will be forced through the spiral passage of the valve stem and the valve turned relatively to its seat.

4. A hydraulic valve comprising a valve chest, a valve member slidably mounted within said valve chest for controlling the distribution of a liquid flowing therethrough, a rocking shaft extending into said valve chest,

a heart cam mounted rigidly upon said rocking shaft and provided with a portion engaging said valve member in order to actuate said valve member, an inlet chest connected with said valve chest, an inlet valve movably mounted within said inlet chest, mechanism connected with said inlet valve and controllable by movements of said heart cam for controlling the admission of a liquid from said inlet chest into said valve chest, and means controllable at the will of the operator for actuating said rocking shaft.

In witness whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT L. GRANDSTAFF.

Witnesses:

HARRY IxURNEn, FRED M. COLEMAN. 

